Mass spectrometer



FIG. 1 is a front perspective view of a mass spectrometer showing a first embodiment of our new design;

FIG. 2 is a front view of a mass spectrometer thereof;

FIG. 3 is a left side view of a mass spectrometer thereof;

FIG. 4 is a right side view of a mass spectrometer thereof;

FIG. 5 is a top view of a mass spectrometer thereof;

FIG. 6 is a bottom view of a mass spectrometer thereof;

FIG. 7 is a front perspective view of a second embodiment of a mass spectrometer showing our new design;

FIG. 8 is front view of a mass spectrometer thereof;

FIG. 9 is a left side view of a mass spectrometer thereof;

FIG. 10 is a right side view of a mass spectrometer thereof;

FIG. 11 is a top view of a mass spectrometer thereof; and,

FIG. 12 is a bottom view of a mass spectrometer thereof.

The broken lines in the figures form no part of the claimed design. 

CLAIM The ornamental design for a mass spectrometer, as shown and described. 